Homemade frozen broth for dogs

After chicken has cooked and the bones have been picked clean, 

I take the bones and place them in a small saucepan top with

enough water to cover the bones.  

Place on the stove and boil for about 20 minutes. Then I let it rest (ha, ha) 
and drain the juice off.

I place this broth in ice cube trays. This broth will be given as

                       treats to the dog - homemade frozen chicken broth.